Bevel device



7- H. GALBRAITH 7 2,425,732

BEVEL-DEVQICE Filed Aug. 8, 1945 INVENTOR Q/ HUWZHHD EALBEAITH ATTORNEYW Fl Patented Aug. 19, 1947 UNITED STATES PATENT OFFICE BEVEL DEVICEHoward Galbraith, Vallejo, Calif. Application August 8, 1945, Serial No.609,700 2 Claims. (Cl. 33-98) v( Granted under the act of March 3, 1883,as

' amended April 30, 1928; 370 0. G. 757) This invention relates to abevel device and provide a bevel device in which a plurality of bevelarms, preferably four in number, are pivotally connected with extensiblebody members for movement in planes substantially at right angles toeach other in order to define a geometrical solid having end facesoblique to the longitudinal axis in two different planes.

It is a further object. of the invention to provide for carrying out theforegoing object in a facile, economical and efficient manner,

In accomplishing these and other objects of the present invention, Ihave provided improved details of structure, the preferred form'of whichis illustrated in the accompanying drawing, wherein:

The single figure is a perspective view of a bevel device embodying thefeatures of my invention.

Referring more in detail to the drawing:

The bevel device of my invention comprises a first body member I and asecond body member 2, the body members preferably being in the form ofelongated prisms rectangular in cross section and rounded at the outerends.

Aifixed to the first body member I adjacent an end thereof is anextension support member 3, which preferably carries a linear scale 4.The

support member 3 extends from the inner end of I the body member I withits longitudinal axis being substantially parallel to the longitudinalaxis of the body member. The second body inner membe 2 has a groove orrecessi extending from the inner end thereof, preferably in its outerface, in which the member 3 is slidably received. Preferably agraduation 6 is marked on the face of the second body member 2 adjacentthe groove or recess 5. Preferably a second extension support member Iis affixed to one of the body members I or 2 and slidably received in a,groove in the other body member on the faces opposite the faces on whichthe support member 3 is aiiixed and slidably received. The secondextension support member I may be similar in construction to theextension support member 3.

The first body member I preferably has a channel 8 cut into the roundedouter end portion opposite the end to which the extension support 3 isaffixed and the second body member 2 preferably has a similar channel 9cut into its rounded outer end portion. The respective faces of thechannels 8 and 9 are substantially co-planar.

A first bevel arm I0 is pivoted to the first body member I, preferablywithin the channel 8, on a pivot stud II. A second bevel arm I2 ispivoted to the second body member 2, preferably within the channel 9, ona pivot stud I3. The bevel arms I0 and I2 have straight outeredges [landI5 respectively that are tangential to the rounded outer ends of thebody members I and 2 respectively. Pivotal movement of the bevel arms Inand I2 is preferably in substantially the same plane. 1

A third bevel arm I6 is pivotally connected to the first body member Ifor movement in a plane substantially at right angles to the planes ofmovement of the first and second bevel arms I0 and I2. A fourth bevelarm I! is pivotally connected with the second body member 2 for movementpreferably in substantially the same plane as the movement of the thirdbevel arm I6.

The third bevel arm comprises a straight edge member I8, an outer linkI9, and an inner link 20. The inner link 20 ispivoted to the first bodymember I inwardly of'the first bevelarm I0 on a pivot study 2 I. Theouter link I9 is pivoted to the inner link'20 on a pivot stud 22 and thestraight edge member I8 is pivoted to the outer link I9 on a pivot stud23. The fourth bevel arm I'I, pivoted to the second body member 2, issimilar in construction to the third bevel arm I6 and hence is notdescribed in detail.

Operation The bevel device of my invention has particular application indelineating wood blocks to be cut to fit as brace members betweensupports in which it is necessary to provide beveled end faces obliqueto the longitudinal axes of the blocks in two different planes at rightangles to each other in order to achieve a satisfactory fit. An exampleof such an application is in the cutting of rising blocks or clampblocks which are fitted between the frames in boat construction. Thesurfaces of adjacent frames in a boat are ordinarily out of parallel inall planes due to the peculiar curved configuration of a boat. In orderto provide firm construction in a boat, it is necessary to insert risingblocks and clamp blocks between adjacent frames to brace them.

In using the bevel device of my invention to delineate a block to be cutto form a rising block or a clamp block, for example, the device isplaced between the adjacent frames of a boat and oriented preferably asshown in the figure. The first and second body members I and 2 areextended until the ends contact the surfaces of the frames. Thegraduation on the scale 4 opposite to the graduation B on the secondbody member 2 is noted.

The first and second bevel arms 10 and 12 are moved about the pivotstuds II and 13 until the straight edges [4 and I5 are in contact withthe adjacent surfaces of the frames. The third and fourth bevel arms i6and I1 are moved in planes substantially at right angles to the planesof movement of the first and second bevel arms I and 2 until thestraight edges thereof contact the surfaces of the frames. bevel armsand I 2 define the verticalangles between the frames and the third andfourth bevel arms l6 and I1 define the horizontal'angles between theframes. 7

The first and second body members I and 2 are moved inwardly toward eachother and the device removed from between the frames. The body members.are moved outwardly until the graduation 6 on the second body member 2is aligned with the graduation on the scale 4 with which it was alignedwhenthe device was between the frames.

The device" is placed over a block of wood to be used: in making therising or'clamp block and adjusted so that: th'e'first and second bevelarms l0 and I2. are against a surface. and the third and fourth bevelarms I6 and IT are against a surface at right angles to the firstsurface. The block of wood is marked with a suitable marking tool movedalong the straight edges of the bevel arms. The block may then be cut tobe used as a rising or clamp block to fit between the frames betweenwhich the measurement was taken.

I have explained the manner in which the devicemay beused to delineatewood blocks used as rising or clamp blocks in boat construction.However, it is obvious that the device may be used in a similarmanner'to delineate. geometric solids of any material to be cut'innumerous other applications. The use in connection with boatconstruction'is thereforeto be considered only as an exampleof'themanner in which the device-may be used.

While I have shown but one embodiment of'my invention, it is apparentthat the device is susceptible to modification without departing fromthe spirit of the invention. I do not wish, therefore, to be limited bythe disclosures set forth, but only by the scope of the appended claims.

The invention described herein may be manufactured and used by or forthe Government of the United States of America for governmental purposeswithout the payment of any royalties thereon or therefor.

The first and second I claim:

1. A bevel device comprising an elongated first body member, anelongated second body member, an elongated extension support memberhaving a linear scale on an outer face thereof afilxed to an end portionof one of said body members and extending therefrom with itslongitudinal axis substantially parallel to the longitudinal axis of thebody member to which it is affixed, the other of said body membershaving a recess slidably receiving said extension support member, afirst bevel arm pivoted to said first body member adjacent the oppositeend thereof, a second bevel arm pivotedto saidsecond body memberadjacent the opposite end thereof for movement in substantially the sameplane as said first bevel arm, a jointed, third bevel arm pivotallyconnected with said first. body member for movement about an axisparallel to the intersection of the plane of said first and second bevelarms with a plane normal to the longitudinal axis of said body members,and a jointed fourth bevel arm pivotally connected with said second bodymember for movement in substantially the same plane as said third bevelarm.

2. In a bevel device, a pair of body members connected for slidableelongation movement relative to each other, a first pair of bevel armspivotally connected with said body members for substantially co-planarmovement, a second pair of bevel arms pivotally connected with said bodymembers for substantially co-planar movement about axes parallel to theintersection of the plane of movement of said first pair of bevel armswith a plane normal to the direction of elongation movement of said.body members, each of said second pair of bevel arms including an innerlink pivoted adjacent one end directly to a body'memher, an outer linkpivoted to said inner link adjacent the other end thereof, and astraight edge member pivoted'to the outer link.

HOWARD GALBRAITH.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 407,288 Fletcher July 16, 1889718,344 Hampton Jan. 13, 1903 1,691,801 Fothergill Nov. 13, 1928 967,045Park Aug. 9, 1910 1,253,096 Preston Jan. 8, 1918

